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Table 4.

Percentages of ringed galaxies and the control sample (CS) in rich and poor groups with low star formation activity and old stellar populations, along with their corresponding standard errors.

Restrictions Log(SFR/M*) < − 10.6 Dn(4000) > 1.5
% Ringed in poor groups 66.12 ± 0.81% 70.23 ± 0.83%
% CS in poor groups 43.39 ± 0.66 % 46.69 ± 0.68%

% Ringed in rich groups 80.66 ± 0.90% 84.00 ± 0.92%
% CS in rich groups 53.66 ± 0.73 % 56.91 ± 0.75%

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